The reason drinking is so prevalent on Saint Patrick’s Day is because St. Patrick died during lent and to celebrate his life properly, restrictions on eating and drinking alcohol were lifted for the day.
Saint Patrick’s color was blue, not green. St. Patrick’s blue, can be seen on ancient Irish flags & was used on armbands & flags by the Irish Citizen Army up until the 1798 Irish Rebellion. This is when the clover & the color green taken from Irelands lush fields became symbol’s for Ireland.
Saint Patrick’s Day began as a “feast day” in honor of the anniversary of the day Saint Patrick died. To honor him, Christians could put aside their Lenten restrictions on food and alcohol consumption on this day, which is why excessive drinking has become so permanently linked to the celebration.
During the Mexican-American war an estimated 700 Irish men deserted the US Army to join the Mexicans and fought in the Battle of Churubusco. The were called Batallón de San Patricio (St. Patricks battalion) and are considered heroes of Mexico.